There is ample evidence that it was goverment policies that led to Great Recession. So if the government attempted to try any of the leaders in the financial world, then those government policies would be the forefront of the defendants' defense. It would finally be on the record that government caused the recession and that would destroy Obama's and the Democrat's vision for American governance. That is why no financial leader will ever be arrested and tryed.
Now tell me you will vote for a second Obama term come November.